吉木萨尔凹陷芦草沟组孔隙结构定量表征
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摘要
吉木萨尔凹陷芦草沟组属于典型的页岩油储集层,而页岩油储集层"甜点"作为开发的主要目的层,其孔隙结构特征是储集层研究的根本。运用低温液氮吸附、高压压汞、扫描电镜和核磁共振4种实验方法,对吉木萨尔凹陷芦草沟组储集层孔隙特征进行了分析。结果表明,芦草沟组储集层孔隙类型主要为纳米孔和亚微米孔,纳米孔隙直径主要分布在10～80 nm,亚微米孔隙直径主要分布在0.1～0.3μm.并对4种方法进行了对比,明确解释了它们的优缺点以及侧重点。
The Lucaogou formation in the Jimsar sag is a typical shale oil reservoir, and the"sweet spot"of shale oil reservoir is the main target for oilfield development. The pore structure of the reservoir is the foundation of reservoir research. The pore characteristics of the reservoir of Lucaogou formation in the Jimsar sag are analyzed by using low temperature liquid nitrogen adsorption, high pressure mercury injection, scanning electron microscopy and nuclear magnetic resonance. The results show that the pore types of the Lucaogou formation are mainly nanopores and submicron pores. The diameter of the nanopores is mainly distributed in the range of 10～80 nm,and the submicron pore diameters are mainly distributed in the range of 0.1～0.3 μm. The four methods are compared and the advantages,disadvantages and priorities of the various methods are clearly explained.
The Lucaogou formation in the Jimsar sag is a typical shale oil reservoir, and the"sweet spot"of shale oil reservoir is the main target for oilfield development. The pore structure of the reservoir is the foundation of reservoir research. The pore characteristics of the reservoir of Lucaogou formation in the Jimsar sag are analyzed by using low temperature liquid nitrogen adsorption, high pressure mercury injection, scanning electron microscopy and nuclear magnetic resonance. The results show that the pore types of the Lucaogou formation are mainly nanopores and submicron pores. The diameter of the nanopores is mainly distributed in the range of 10～80 nm,and the submicron pore diameters are mainly distributed in the range of 0.1～0.3 μm. The four methods are compared and the advantages,disadvantages and priorities of the various methods are clearly explained.
引文
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[16]COMISKY J T,SANTIAGO M,MCCOLLOM B,et al.Sample size effects on the application of mercury injection capillary pressure for determining the storage capacity of tight gas and oil shales[R].SPE 149432,2011.
[2]杜金虎,刘合,马德胜,等.试论中国陆相致密油有效开发技术[J].石油勘探与开发,2014,41(2):198-205.DU Jinhu,LIU He,MA Desheng,et al.Discussion on effective development techniques for continental tight oil in China[J].Petroleum Exploration and Development,2014,41(2):198-205.
[3]匡立春,唐勇,雷德文,等.准噶尔盆地二叠系咸化湖相云质岩致密油形成条件与勘探潜力[J].石油勘探与开发,2012,39(6):657-667.KUANG Lichun,TANG Yong,LEI Dewen,et al.Formation conditions and exploration potential of tight oil in the Permian saline lacustrine dolomitic rock,Junggar basin,NW China[J].Petroleum Exploration and Development,2012,39(6):657-667.
[4]斯春松,陈能贵,余朝丰,等.吉木萨尔凹陷二叠系芦草沟组致密油储层沉积特征[J].石油实验地质,2013,35(5):528-533.SI Chunsong,CHEN Nenggui,YU Chaofeng,et al.Sedimentary characteristics of tight oil reservoir in Permian Lucaogou formation,Jimsar sag[J].Petroleum Geology&Experiment,2013,35(5):528-533.
[5]葸克来,操应长,朱如凯,等.吉木萨尔凹陷二叠系芦草沟组致密油储层岩石类型及特征[J].石油学报,2015,36(12):1 495-1 507.XI Kelai,CAO Yingchang,ZHU Rukai,et al.Rock types and characteristics of tight oil reservoir in Permian Lucaogou formation,Jimsar sag[J].Acta Petrolei Sinica,2015,36(12):1 495-1 507.
[6]廉欢,查明,高长海,等.吉木萨尔凹陷芦草沟组异常高压与致密油富集[J].新疆石油地质,2016,37(2):163-168.LIAN Huan,ZHA Ming,GAO Changhai,et al.Abnormal high pressure and tight oil enrichment of Lucaogou formation in Jimusaer sag[J].Xinjiang Petroleum Geology,2016,37(2):163-168.
[7]王屿涛,杨作明,马万云,等.吉木萨尔凹陷芦草沟组致密油地球化学特征及成因[J].新疆石油地质,2017,38(4):379-384.WANG Yutao,YANG Zuoming,MA Wanyun,et al.Geochemical characteristics and genesis of tight oil in Lucaogou formation of Jimsar sag[J].Xinjiang Petroleum Geology,2017,38(4):379-384.
[8]ADESIDA A G,AKKUTLU I Y,RESASCO D E,et al.Kerogen pore size distribution of Barnett shale using DFT analysis and Monte Carlo simulation[R].SPE 147397,2011.
[9]高辉,解伟,杨建鹏,等.基于恒速压汞技术的特低-超低渗砂岩储层微观孔喉特征[J].石油实验地质,2011,33(2):206-211.GAO Hui,XIE Wei,YANG Jianpeng,et al.Pore throat characteristics of extra-ultra low permeability sandstone reservoir based on constant-rate mercury penetration technique[J].Petroleum Geology&Experiment,2011,33(2):206-211.
[10]全国筛网筛分和颗粒分检方法标准化技术委员会.压汞法和气体吸附法测定固体材料孔径分布和孔隙度-第3部分:气体吸附法分析微孔GB/T 21650.3-2011[S].北京:中国标准出版社,2012.National Technical Committee on Screening and Particle Screening Methods of Standardization Administration of China.Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption method-Part 3:analysis of micropores by gas adsorption GB/T 21650.3-2011[S].Beijing:Standards Press of China,2012.
[11]BRUNAUER S,EMMETT P H,TELLER E.Adsorption of gases in multimolecular layers[J].Journal of the American Chemical Society,1938,60(2):309-319
[12]BARRETT E P,JOYNER L G,HALENDA P P.The determination of pore volume and area distributions in porous substances.I.Computations from nitrogen isotherms[J].Journal of the American Chemical Society,1951,73(1):373-380.
[13]近藤精一,石川达雄,安部郁夫.吸附科学(第2版)[M].北京:化学工业出版社,2006.KONDO SEIICHI,ISHIKAWA TATSUO ABE IKUO.adsorption science(2nd edition)[M].Beijing:Chemical Industry Press,2006.
[14]杨峰,宁正福,张世栋,等.基于氮气吸附实验的页岩孔隙结构表征[J].天然气工业,2013,33(4):135-140.YANG Feng,NING Zhengfu,ZHANG Shidong,et al.Characterization of pore structures in shales through nitrogen adsorption experiment[J].Natural Gas Industry,2013,33(4):135-140.
[15]孙志刚,贾丽华,张礼臻,等.核磁共振技术在低渗低黏油层孔隙结构评价中的应用[J].新疆石油地质,2017,38(6):735-739.SUN Zhigang,JIA Lihua,ZHANG Lizhen,et al.Application of NMR technology in pore structure evaluation for low-permeability and low-viscosity oil reservoirs[J].Xinjiang Petroleum Geology,2017,38(6):735-739.
[16]COMISKY J T,SANTIAGO M,MCCOLLOM B,et al.Sample size effects on the application of mercury injection capillary pressure for determining the storage capacity of tight gas and oil shales[R].SPE 149432,2011.